Make black happy

Author: dglaude

adafruit_pm25/__init__.py

@@ -82,7 +82,7 @@ def read(self):
         # print([hex(i) for i in self._buffer])
 
         # check packet header
-        if not self._buffer[0:2] == b'BM':
+        if not self._buffer[0:2] == b"BM":
             raise RuntimeError("Invalid PM2.5 header")
 
         # check frame length